drivers/platform/x86/hp-wmi.c

   1 /*
   2  * HP WMI hotkeys
   3  *
   4  * Copyright (C) 2008 Red Hat <mjg@redhat.com>
   5  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/types.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/acpi.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/string.h>
  40
  41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
  42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
  43 MODULE_LICENSE("GPL");
  44
  45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
  46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
  47
  48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
  50
  51 #define HPWMI_DISPLAY_QUERY 0x1
  52 #define HPWMI_HDDTEMP_QUERY 0x2
  53 #define HPWMI_ALS_QUERY 0x3
  54 #define HPWMI_HARDWARE_QUERY 0x4
  55 #define HPWMI_WIRELESS_QUERY 0x5
  56 #define HPWMI_BIOS_QUERY 0x9
  57 #define HPWMI_HOTKEY_QUERY 0xc
  58 #define HPWMI_WIRELESS2_QUERY 0x1b
  59 #define HPWMI_POSTCODEERROR_QUERY 0x2a
  60
  61 enum hp_wmi_radio {
  62         HPWMI_WIFI = 0,
  63         HPWMI_BLUETOOTH = 1,
  64         HPWMI_WWAN = 2,
  65         HPWMI_GPS = 3,
  66 };
  67
  68 enum hp_wmi_event_ids {
  69         HPWMI_DOCK_EVENT = 1,
  70         HPWMI_PARK_HDD = 2,
  71         HPWMI_SMART_ADAPTER = 3,
  72         HPWMI_BEZEL_BUTTON = 4,
  73         HPWMI_WIRELESS = 5,
  74         HPWMI_CPU_BATTERY_THROTTLE = 6,
  75         HPWMI_LOCK_SWITCH = 7,
  76         HPWMI_LID_SWITCH = 8,
  77         HPWMI_SCREEN_ROTATION = 9,
  78         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
  79         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
  80         HPWMI_PROXIMITY_SENSOR = 0x0C,
  81         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
  82         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
  83         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
  84 };
  85
  86 struct bios_args {
  87         u32 signature;
  88         u32 command;
  89         u32 commandtype;
  90         u32 datasize;
  91         u32 data;
  92 };
  93
  94 struct bios_return {
  95         u32 sigpass;
  96         u32 return_code;
  97 };
  98
  99 enum hp_return_value {
 100         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
 101         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
 102         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
 103         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
 104 };
 105
 106 enum hp_wireless2_bits {
 107         HPWMI_POWER_STATE       = 0x01,
 108         HPWMI_POWER_SOFT        = 0x02,
 109         HPWMI_POWER_BIOS        = 0x04,
 110         HPWMI_POWER_HARD        = 0x08,
 111 };
 112
 113 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
 114                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
 115 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
 116
 117 struct bios_rfkill2_device_state {
 118         u8 radio_type;
 119         u8 bus_type;
 120         u16 vendor_id;
 121         u16 product_id;
 122         u16 subsys_vendor_id;
 123         u16 subsys_product_id;
 124         u8 rfkill_id;
 125         u8 power;
 126         u8 unknown[4];
 127 };
 128
 129 /* 7 devices fit into the 128 byte buffer */
 130 #define HPWMI_MAX_RFKILL2_DEVICES       7
 131
 132 struct bios_rfkill2_state {
 133         u8 unknown[7];
 134         u8 count;
 135         u8 pad[8];
 136         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
 137 };
 138
 139 static const struct key_entry hp_wmi_keymap[] = {
 140         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
 141         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
 142         { KE_KEY, 0x20e6, { KEY_PROG1 } },
 143         { KE_KEY, 0x20e8, { KEY_MEDIA } },
 144         { KE_KEY, 0x2142, { KEY_MEDIA } },
 145         { KE_KEY, 0x213b, { KEY_INFO } },
 146         { KE_KEY, 0x2169, { KEY_DIRECTION } },
 147         { KE_KEY, 0x231b, { KEY_HELP } },
 148         { KE_END, 0 }
 149 };
 150
 151 static struct input_dev *hp_wmi_input_dev;
 152 static struct platform_device *hp_wmi_platform_dev;
 153
 154 static struct rfkill *wifi_rfkill;
 155 static struct rfkill *bluetooth_rfkill;
 156 static struct rfkill *wwan_rfkill;
 157 static struct rfkill *gps_rfkill;
 158
 159 struct rfkill2_device {
 160         u8 id;
 161         int num;
 162         struct rfkill *rfkill;
 163 };
 164
 165 static int rfkill2_count;
 166 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
 167
 168 /*
 169  * hp_wmi_perform_query
 170  *
 171  * query:       The commandtype -> What should be queried
 172  * write:       The command -> 0 read, 1 write, 3 ODM specific
 173  * buffer:      Buffer used as input and/or output
 174  * insize:      Size of input buffer
 175  * outsize:     Size of output buffer
 176  *
 177  * returns zero on success
 178  *         an HP WMI query specific error code (which is positive)
 179  *         -EINVAL if the query was not successful at all
 180  *         -EINVAL if the output buffer size exceeds buffersize
 181  *
 182  * Note: The buffersize must at least be the maximum of the input and output
 183  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
 184  *       and 128 byte output. The caller would do:
 185  *       buffer = kzalloc(128, GFP_KERNEL);
 186  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
 187  */
 188 static int hp_wmi_perform_query(int query, int write, void *buffer,
 189                                 int insize, int outsize)
 190 {
 191         struct bios_return *bios_return;
 192         int actual_outsize;
 193         union acpi_object *obj;
 194         struct bios_args args = {
 195                 .signature = 0x55434553,
 196                 .command = write ? 0x2 : 0x1,
 197                 .commandtype = query,
 198                 .datasize = insize,
 199                 .data = 0,
 200         };
 201         struct acpi_buffer input = { sizeof(struct bios_args), &args };
 202         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 203         u32 rc;
 204
 205         if (WARN_ON(insize > sizeof(args.data)))
 206                 return -EINVAL;
 207         memcpy(&args.data, buffer, insize);
 208
 209         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
 210
 211         obj = output.pointer;
 212
 213         if (!obj)
 214                 return -EINVAL;
 215         else if (obj->type != ACPI_TYPE_BUFFER) {
 216                 kfree(obj);
 217                 return -EINVAL;
 218         }
 219
 220         bios_return = (struct bios_return *)obj->buffer.pointer;
 221         rc = bios_return->return_code;
 222
 223         if (rc) {
 224                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
 225                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
 226                 kfree(obj);
 227                 return rc;
 228         }
 229
 230         if (!outsize) {
 231                 /* ignore output data */
 232                 kfree(obj);
 233                 return 0;
 234         }
 235
 236         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
 237         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
 238         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
 239         kfree(obj);
 240         return 0;
 241 }
 242
 243 static int hp_wmi_display_state(void)
 244 {
 245         int state = 0;
 246         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
 247                                        sizeof(state), sizeof(state));
 248         if (ret)
 249                 return -EINVAL;
 250         return state;
 251 }
 252
 253 static int hp_wmi_hddtemp_state(void)
 254 {
 255         int state = 0;
 256         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
 257                                        sizeof(state), sizeof(state));
 258         if (ret)
 259                 return -EINVAL;
 260         return state;
 261 }
 262
 263 static int hp_wmi_als_state(void)
 264 {
 265         int state = 0;
 266         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
 267                                        sizeof(state), sizeof(state));
 268         if (ret)
 269                 return -EINVAL;
 270         return state;
 271 }
 272
 273 static int hp_wmi_dock_state(void)
 274 {
 275         int state = 0;
 276         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 277                                        sizeof(state), sizeof(state));
 278
 279         if (ret)
 280                 return -EINVAL;
 281
 282         return state & 0x1;
 283 }
 284
 285 static int hp_wmi_tablet_state(void)
 286 {
 287         int state = 0;
 288         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
 289                                        sizeof(state), sizeof(state));
 290         if (ret)
 291                 return ret;
 292
 293         return (state & 0x4) ? 1 : 0;
 294 }
 295
 296 static int hp_wmi_enable_hotkeys(void)
 297 {
 298         int ret;
 299         int query = 0x6e;
 300
 301         ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
 302                                    0);
 303
 304         if (ret)
 305                 return -EINVAL;
 306         return 0;
 307 }
 308
 309 static int hp_wmi_set_block(void *data, bool blocked)
 310 {
 311         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
 312         int query = BIT(r + 8) | ((!blocked) << r);
 313         int ret;
 314
 315         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
 316                                    &query, sizeof(query), 0);
 317         if (ret)
 318                 return -EINVAL;
 319         return 0;
 320 }
 321
 322 static const struct rfkill_ops hp_wmi_rfkill_ops = {
 323         .set_block = hp_wmi_set_block,
 324 };
 325
 326 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
 327 {
 328         int wireless = 0;
 329         int mask;
 330         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 331                              &wireless, sizeof(wireless),
 332                              sizeof(wireless));
 333         /* TBD: Pass error */
 334
 335         mask = 0x200 << (r * 8);
 336
 337         if (wireless & mask)
 338                 return false;
 339         else
 340                 return true;
 341 }
 342
 343 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
 344 {
 345         int wireless = 0;
 346         int mask;
 347         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
 348                              &wireless, sizeof(wireless),
 349                              sizeof(wireless));
 350         /* TBD: Pass error */
 351
 352         mask = 0x800 << (r * 8);
 353
 354         if (wireless & mask)
 355                 return false;
 356         else
 357                 return true;
 358 }
 359
 360 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
 361 {
 362         int rfkill_id = (int)(long)data;
 363         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
 364
 365         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
 366                                    buffer, sizeof(buffer), 0))
 367                 return -EINVAL;
 368         return 0;
 369 }
 370
 371 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
 372         .set_block = hp_wmi_rfkill2_set_block,
 373 };
 374
 375 static int hp_wmi_rfkill2_refresh(void)
 376 {
 377         int err, i;
 378         struct bios_rfkill2_state state;
 379
 380         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 381                                    0, sizeof(state));
 382         if (err)
 383                 return err;
 384
 385         for (i = 0; i < rfkill2_count; i++) {
 386                 int num = rfkill2[i].num;
 387                 struct bios_rfkill2_device_state *devstate;
 388                 devstate = &state.device[num];
 389
 390                 if (num >= state.count ||
 391                     devstate->rfkill_id != rfkill2[i].id) {
 392                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
 393                         continue;
 394                 }
 395
 396                 rfkill_set_states(rfkill2[i].rfkill,
 397                                   IS_SWBLOCKED(devstate->power),
 398                                   IS_HWBLOCKED(devstate->power));
 399         }
 400
 401         return 0;
 402 }
 403
 404 static int hp_wmi_post_code_state(void)
 405 {
 406         int state = 0;
 407         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
 408                                        sizeof(state), sizeof(state));
 409         if (ret)
 410                 return -EINVAL;
 411         return state;
 412 }
 413
 414 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
 415                             char *buf)
 416 {
 417         int value = hp_wmi_display_state();
 418         if (value < 0)
 419                 return -EINVAL;
 420         return sprintf(buf, "%d\n", value);
 421 }
 422
 423 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
 424                             char *buf)
 425 {
 426         int value = hp_wmi_hddtemp_state();
 427         if (value < 0)
 428                 return -EINVAL;
 429         return sprintf(buf, "%d\n", value);
 430 }
 431
 432 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
 433                         char *buf)
 434 {
 435         int value = hp_wmi_als_state();
 436         if (value < 0)
 437                 return -EINVAL;
 438         return sprintf(buf, "%d\n", value);
 439 }
 440
 441 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
 442                          char *buf)
 443 {
 444         int value = hp_wmi_dock_state();
 445         if (value < 0)
 446                 return -EINVAL;
 447         return sprintf(buf, "%d\n", value);
 448 }
 449
 450 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
 451                          char *buf)
 452 {
 453         int value = hp_wmi_tablet_state();
 454         if (value < 0)
 455                 return -EINVAL;
 456         return sprintf(buf, "%d\n", value);
 457 }
 458
 459 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
 460                          char *buf)
 461 {
 462         /* Get the POST error code of previous boot failure. */
 463         int value = hp_wmi_post_code_state();
 464         if (value < 0)
 465                 return -EINVAL;
 466         return sprintf(buf, "0x%x\n", value);
 467 }
 468
 469 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
 470                        const char *buf, size_t count)
 471 {
 472         u32 tmp = simple_strtoul(buf, NULL, 10);
 473         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
 474                                        sizeof(tmp), sizeof(tmp));
 475         if (ret)
 476                 return -EINVAL;
 477
 478         return count;
 479 }
 480
 481 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
 482                        const char *buf, size_t count)
 483 {
 484         int ret;
 485         u32 tmp;
 486         long unsigned int tmp2;
 487
 488         ret = kstrtoul(buf, 10, &tmp2);
 489         if (ret || tmp2 != 1)
 490                 return -EINVAL;
 491
 492         /* Clear the POST error code. It is kept until until cleared. */
 493         tmp = (u32) tmp2;
 494         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
 495                                        sizeof(tmp), sizeof(tmp));
 496         if (ret)
 497                 return -EINVAL;
 498
 499         return count;
 500 }
 501
 502 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
 503 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
 504 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
 505 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
 506 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
 507 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
 508
 509 static void hp_wmi_notify(u32 value, void *context)
 510 {
 511         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
 512         union acpi_object *obj;
 513         u32 event_id, event_data;
 514         int key_code = 0, ret;
 515         u32 *location;
 516         acpi_status status;
 517
 518         status = wmi_get_event_data(value, &response);
 519         if (status != AE_OK) {
 520                 pr_info("bad event status 0x%x\n", status);
 521                 return;
 522         }
 523
 524         obj = (union acpi_object *)response.pointer;
 525
 526         if (!obj)
 527                 return;
 528         if (obj->type != ACPI_TYPE_BUFFER) {
 529                 pr_info("Unknown response received %d\n", obj->type);
 530                 kfree(obj);
 531                 return;
 532         }
 533
 534         /*
 535          * Depending on ACPI version the concatenation of id and event data
 536          * inside _WED function will result in a 8 or 16 byte buffer.
 537          */
 538         location = (u32 *)obj->buffer.pointer;
 539         if (obj->buffer.length == 8) {
 540                 event_id = *location;
 541                 event_data = *(location + 1);
 542         } else if (obj->buffer.length == 16) {
 543                 event_id = *location;
 544                 event_data = *(location + 2);
 545         } else {
 546                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
 547                 kfree(obj);
 548                 return;
 549         }
 550         kfree(obj);
 551
 552         switch (event_id) {
 553         case HPWMI_DOCK_EVENT:
 554                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 555                                     hp_wmi_dock_state());
 556                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 557                                     hp_wmi_tablet_state());
 558                 input_sync(hp_wmi_input_dev);
 559                 break;
 560         case HPWMI_PARK_HDD:
 561                 break;
 562         case HPWMI_SMART_ADAPTER:
 563                 break;
 564         case HPWMI_BEZEL_BUTTON:
 565                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
 566                                            &key_code,
 567                                            sizeof(key_code),
 568                                            sizeof(key_code));
 569                 if (ret)
 570                         break;
 571
 572                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
 573                                                 key_code, 1, true))
 574                         pr_info("Unknown key code - 0x%x\n", key_code);
 575                 break;
 576         case HPWMI_WIRELESS:
 577                 if (rfkill2_count) {
 578                         hp_wmi_rfkill2_refresh();
 579                         break;
 580                 }
 581
 582                 if (wifi_rfkill)
 583                         rfkill_set_states(wifi_rfkill,
 584                                           hp_wmi_get_sw_state(HPWMI_WIFI),
 585                                           hp_wmi_get_hw_state(HPWMI_WIFI));
 586                 if (bluetooth_rfkill)
 587                         rfkill_set_states(bluetooth_rfkill,
 588                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 589                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 590                 if (wwan_rfkill)
 591                         rfkill_set_states(wwan_rfkill,
 592                                           hp_wmi_get_sw_state(HPWMI_WWAN),
 593                                           hp_wmi_get_hw_state(HPWMI_WWAN));
 594                 if (gps_rfkill)
 595                         rfkill_set_states(gps_rfkill,
 596                                           hp_wmi_get_sw_state(HPWMI_GPS),
 597                                           hp_wmi_get_hw_state(HPWMI_GPS));
 598                 break;
 599         case HPWMI_CPU_BATTERY_THROTTLE:
 600                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
 601                 break;
 602         case HPWMI_LOCK_SWITCH:
 603                 break;
 604         case HPWMI_LID_SWITCH:
 605                 break;
 606         case HPWMI_SCREEN_ROTATION:
 607                 break;
 608         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
 609                 break;
 610         case HPWMI_COOLSENSE_SYSTEM_HOT:
 611                 break;
 612         case HPWMI_PROXIMITY_SENSOR:
 613                 break;
 614         case HPWMI_BACKLIT_KB_BRIGHTNESS:
 615                 break;
 616         case HPWMI_PEAKSHIFT_PERIOD:
 617                 break;
 618         case HPWMI_BATTERY_CHARGE_PERIOD:
 619                 break;
 620         default:
 621                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
 622                 break;
 623         }
 624 }
 625
 626 static int __init hp_wmi_input_setup(void)
 627 {
 628         acpi_status status;
 629         int err;
 630
 631         hp_wmi_input_dev = input_allocate_device();
 632         if (!hp_wmi_input_dev)
 633                 return -ENOMEM;
 634
 635         hp_wmi_input_dev->name = "HP WMI hotkeys";
 636         hp_wmi_input_dev->phys = "wmi/input0";
 637         hp_wmi_input_dev->id.bustype = BUS_HOST;
 638
 639         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
 640         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
 641         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
 642
 643         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
 644         if (err)
 645                 goto err_free_dev;
 646
 647         /* Set initial hardware state */
 648         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
 649         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 650                             hp_wmi_tablet_state());
 651         input_sync(hp_wmi_input_dev);
 652
 653         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
 654         if (ACPI_FAILURE(status)) {
 655                 err = -EIO;
 656                 goto err_free_keymap;
 657         }
 658
 659         err = input_register_device(hp_wmi_input_dev);
 660         if (err)
 661                 goto err_uninstall_notifier;
 662
 663         return 0;
 664
 665  err_uninstall_notifier:
 666         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 667  err_free_keymap:
 668         sparse_keymap_free(hp_wmi_input_dev);
 669  err_free_dev:
 670         input_free_device(hp_wmi_input_dev);
 671         return err;
 672 }
 673
 674 static void hp_wmi_input_destroy(void)
 675 {
 676         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
 677         sparse_keymap_free(hp_wmi_input_dev);
 678         input_unregister_device(hp_wmi_input_dev);
 679 }
 680
 681 static void cleanup_sysfs(struct platform_device *device)
 682 {
 683         device_remove_file(&device->dev, &dev_attr_display);
 684         device_remove_file(&device->dev, &dev_attr_hddtemp);
 685         device_remove_file(&device->dev, &dev_attr_als);
 686         device_remove_file(&device->dev, &dev_attr_dock);
 687         device_remove_file(&device->dev, &dev_attr_tablet);
 688         device_remove_file(&device->dev, &dev_attr_postcode);
 689 }
 690
 691 static int hp_wmi_rfkill_setup(struct platform_device *device)
 692 {
 693         int err;
 694         int wireless = 0;
 695
 696         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
 697                                    sizeof(wireless), sizeof(wireless));
 698         if (err)
 699                 return err;
 700
 701         if (wireless & 0x1) {
 702                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
 703                                            RFKILL_TYPE_WLAN,
 704                                            &hp_wmi_rfkill_ops,
 705                                            (void *) HPWMI_WIFI);
 706                 if (!wifi_rfkill)
 707                         return -ENOMEM;
 708                 rfkill_init_sw_state(wifi_rfkill,
 709                                      hp_wmi_get_sw_state(HPWMI_WIFI));
 710                 rfkill_set_hw_state(wifi_rfkill,
 711                                     hp_wmi_get_hw_state(HPWMI_WIFI));
 712                 err = rfkill_register(wifi_rfkill);
 713                 if (err)
 714                         goto register_wifi_error;
 715         }
 716
 717         if (wireless & 0x2) {
 718                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
 719                                                 RFKILL_TYPE_BLUETOOTH,
 720                                                 &hp_wmi_rfkill_ops,
 721                                                 (void *) HPWMI_BLUETOOTH);
 722                 if (!bluetooth_rfkill) {
 723                         err = -ENOMEM;
 724                         goto register_wifi_error;
 725                 }
 726                 rfkill_init_sw_state(bluetooth_rfkill,
 727                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
 728                 rfkill_set_hw_state(bluetooth_rfkill,
 729                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 730                 err = rfkill_register(bluetooth_rfkill);
 731                 if (err)
 732                         goto register_bluetooth_error;
 733         }
 734
 735         if (wireless & 0x4) {
 736                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
 737                                            RFKILL_TYPE_WWAN,
 738                                            &hp_wmi_rfkill_ops,
 739                                            (void *) HPWMI_WWAN);
 740                 if (!wwan_rfkill) {
 741                         err = -ENOMEM;
 742                         goto register_gps_error;
 743                 }
 744                 rfkill_init_sw_state(wwan_rfkill,
 745                                      hp_wmi_get_sw_state(HPWMI_WWAN));
 746                 rfkill_set_hw_state(wwan_rfkill,
 747                                     hp_wmi_get_hw_state(HPWMI_WWAN));
 748                 err = rfkill_register(wwan_rfkill);
 749                 if (err)
 750                         goto register_wwan_err;
 751         }
 752
 753         if (wireless & 0x8) {
 754                 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
 755                                                 RFKILL_TYPE_GPS,
 756                                                 &hp_wmi_rfkill_ops,
 757                                                 (void *) HPWMI_GPS);
 758                 if (!gps_rfkill) {
 759                         err = -ENOMEM;
 760                         goto register_bluetooth_error;
 761                 }
 762                 rfkill_init_sw_state(gps_rfkill,
 763                                      hp_wmi_get_sw_state(HPWMI_GPS));
 764                 rfkill_set_hw_state(gps_rfkill,
 765                                     hp_wmi_get_hw_state(HPWMI_GPS));
 766                 err = rfkill_register(gps_rfkill);
 767                 if (err)
 768                         goto register_gps_error;
 769         }
 770
 771         return 0;
 772 register_wwan_err:
 773         rfkill_destroy(wwan_rfkill);
 774         wwan_rfkill = NULL;
 775         if (gps_rfkill)
 776                 rfkill_unregister(gps_rfkill);
 777 register_gps_error:
 778         rfkill_destroy(gps_rfkill);
 779         gps_rfkill = NULL;
 780         if (bluetooth_rfkill)
 781                 rfkill_unregister(bluetooth_rfkill);
 782 register_bluetooth_error:
 783         rfkill_destroy(bluetooth_rfkill);
 784         bluetooth_rfkill = NULL;
 785         if (wifi_rfkill)
 786                 rfkill_unregister(wifi_rfkill);
 787 register_wifi_error:
 788         rfkill_destroy(wifi_rfkill);
 789         wifi_rfkill = NULL;
 790         return err;
 791 }
 792
 793 static int hp_wmi_rfkill2_setup(struct platform_device *device)
 794 {
 795         int err, i;
 796         struct bios_rfkill2_state state;
 797         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
 798                                    0, sizeof(state));
 799         if (err)
 800                 return err;
 801
 802         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
 803                 pr_warn("unable to parse 0x1b query output\n");
 804                 return -EINVAL;
 805         }
 806
 807         for (i = 0; i < state.count; i++) {
 808                 struct rfkill *rfkill;
 809                 enum rfkill_type type;
 810                 char *name;
 811                 switch (state.device[i].radio_type) {
 812                 case HPWMI_WIFI:
 813                         type = RFKILL_TYPE_WLAN;
 814                         name = "hp-wifi";
 815                         break;
 816                 case HPWMI_BLUETOOTH:
 817                         type = RFKILL_TYPE_BLUETOOTH;
 818                         name = "hp-bluetooth";
 819                         break;
 820                 case HPWMI_WWAN:
 821                         type = RFKILL_TYPE_WWAN;
 822                         name = "hp-wwan";
 823                         break;
 824                 case HPWMI_GPS:
 825                         type = RFKILL_TYPE_GPS;
 826                         name = "hp-gps";
 827                         break;
 828                 default:
 829                         pr_warn("unknown device type 0x%x\n",
 830                                 state.device[i].radio_type);
 831                         continue;
 832                 }
 833
 834                 if (!state.device[i].vendor_id) {
 835                         pr_warn("zero device %d while %d reported\n",
 836                                 i, state.count);
 837                         continue;
 838                 }
 839
 840                 rfkill = rfkill_alloc(name, &device->dev, type,
 841                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
 842                 if (!rfkill) {
 843                         err = -ENOMEM;
 844                         goto fail;
 845                 }
 846
 847                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
 848                 rfkill2[rfkill2_count].num = i;
 849                 rfkill2[rfkill2_count].rfkill = rfkill;
 850
 851                 rfkill_init_sw_state(rfkill,
 852                                      IS_SWBLOCKED(state.device[i].power));
 853                 rfkill_set_hw_state(rfkill,
 854                                     IS_HWBLOCKED(state.device[i].power));
 855
 856                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
 857                         pr_info("device %s blocked by BIOS\n", name);
 858
 859                 err = rfkill_register(rfkill);
 860                 if (err) {
 861                         rfkill_destroy(rfkill);
 862                         goto fail;
 863                 }
 864
 865                 rfkill2_count++;
 866         }
 867
 868         return 0;
 869 fail:
 870         for (; rfkill2_count > 0; rfkill2_count--) {
 871                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
 872                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
 873         }
 874         return err;
 875 }
 876
 877 static int __init hp_wmi_bios_setup(struct platform_device *device)
 878 {
 879         int err;
 880
 881         /* clear detected rfkill devices */
 882         wifi_rfkill = NULL;
 883         bluetooth_rfkill = NULL;
 884         wwan_rfkill = NULL;
 885         gps_rfkill = NULL;
 886         rfkill2_count = 0;
 887
 888         if (hp_wmi_rfkill_setup(device))
 889                 hp_wmi_rfkill2_setup(device);
 890
 891         err = device_create_file(&device->dev, &dev_attr_display);
 892         if (err)
 893                 goto add_sysfs_error;
 894         err = device_create_file(&device->dev, &dev_attr_hddtemp);
 895         if (err)
 896                 goto add_sysfs_error;
 897         err = device_create_file(&device->dev, &dev_attr_als);
 898         if (err)
 899                 goto add_sysfs_error;
 900         err = device_create_file(&device->dev, &dev_attr_dock);
 901         if (err)
 902                 goto add_sysfs_error;
 903         err = device_create_file(&device->dev, &dev_attr_tablet);
 904         if (err)
 905                 goto add_sysfs_error;
 906         err = device_create_file(&device->dev, &dev_attr_postcode);
 907         if (err)
 908                 goto add_sysfs_error;
 909         return 0;
 910
 911 add_sysfs_error:
 912         cleanup_sysfs(device);
 913         return err;
 914 }
 915
 916 static int __exit hp_wmi_bios_remove(struct platform_device *device)
 917 {
 918         int i;
 919         cleanup_sysfs(device);
 920
 921         for (i = 0; i < rfkill2_count; i++) {
 922                 rfkill_unregister(rfkill2[i].rfkill);
 923                 rfkill_destroy(rfkill2[i].rfkill);
 924         }
 925
 926         if (wifi_rfkill) {
 927                 rfkill_unregister(wifi_rfkill);
 928                 rfkill_destroy(wifi_rfkill);
 929         }
 930         if (bluetooth_rfkill) {
 931                 rfkill_unregister(bluetooth_rfkill);
 932                 rfkill_destroy(bluetooth_rfkill);
 933         }
 934         if (wwan_rfkill) {
 935                 rfkill_unregister(wwan_rfkill);
 936                 rfkill_destroy(wwan_rfkill);
 937         }
 938         if (gps_rfkill) {
 939                 rfkill_unregister(gps_rfkill);
 940                 rfkill_destroy(gps_rfkill);
 941         }
 942
 943         return 0;
 944 }
 945
 946 static int hp_wmi_resume_handler(struct device *device)
 947 {
 948         /*
 949          * Hardware state may have changed while suspended, so trigger
 950          * input events for the current state. As this is a switch,
 951          * the input layer will only actually pass it on if the state
 952          * changed.
 953          */
 954         if (hp_wmi_input_dev) {
 955                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
 956                                     hp_wmi_dock_state());
 957                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
 958                                     hp_wmi_tablet_state());
 959                 input_sync(hp_wmi_input_dev);
 960         }
 961
 962         if (rfkill2_count)
 963                 hp_wmi_rfkill2_refresh();
 964
 965         if (wifi_rfkill)
 966                 rfkill_set_states(wifi_rfkill,
 967                                   hp_wmi_get_sw_state(HPWMI_WIFI),
 968                                   hp_wmi_get_hw_state(HPWMI_WIFI));
 969         if (bluetooth_rfkill)
 970                 rfkill_set_states(bluetooth_rfkill,
 971                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
 972                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
 973         if (wwan_rfkill)
 974                 rfkill_set_states(wwan_rfkill,
 975                                   hp_wmi_get_sw_state(HPWMI_WWAN),
 976                                   hp_wmi_get_hw_state(HPWMI_WWAN));
 977         if (gps_rfkill)
 978                 rfkill_set_states(gps_rfkill,
 979                                   hp_wmi_get_sw_state(HPWMI_GPS),
 980                                   hp_wmi_get_hw_state(HPWMI_GPS));
 981
 982         return 0;
 983 }
 984
 985 static const struct dev_pm_ops hp_wmi_pm_ops = {
 986         .resume  = hp_wmi_resume_handler,
 987         .restore  = hp_wmi_resume_handler,
 988 };
 989
 990 static struct platform_driver hp_wmi_driver = {
 991         .driver = {
 992                 .name = "hp-wmi",
 993                 .owner = THIS_MODULE,
 994                 .pm = &hp_wmi_pm_ops,
 995         },
 996         .remove = __exit_p(hp_wmi_bios_remove),
 997 };
 998
 999 static int __init hp_wmi_init(void)
1000 {
1001         int err;
1002         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1003         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1004
1005         if (!bios_capable && !event_capable)
1006                 return -ENODEV;
1007
1008         if (event_capable) {
1009                 err = hp_wmi_input_setup();
1010                 if (err)
1011                         return err;
1012
1013                 hp_wmi_enable_hotkeys();
1014         }
1015
1016         if (bios_capable) {
1017                 hp_wmi_platform_dev =
1018                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1019                 if (IS_ERR(hp_wmi_platform_dev)) {
1020                         err = PTR_ERR(hp_wmi_platform_dev);
1021                         goto err_destroy_input;
1022                 }
1023
1024                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1025                 if (err)
1026                         goto err_unregister_device;
1027         }
1028
1029         return 0;
1030
1031 err_unregister_device:
1032         platform_device_unregister(hp_wmi_platform_dev);
1033 err_destroy_input:
1034         if (event_capable)
1035                 hp_wmi_input_destroy();
1036
1037         return err;
1038 }
1039 module_init(hp_wmi_init);
1040
1041 static void __exit hp_wmi_exit(void)
1042 {
1043         if (wmi_has_guid(HPWMI_EVENT_GUID))
1044                 hp_wmi_input_destroy();
1045
1046         if (hp_wmi_platform_dev) {
1047                 platform_device_unregister(hp_wmi_platform_dev);
1048                 platform_driver_unregister(&hp_wmi_driver);
1049         }
1050 }
1051 module_exit(hp_wmi_exit);